There's a good reason why people want LCD's - LCD TV's now cost LESS than CRT's for the same sizes. Above 32", they're much cheaper - you can get a Syntax-Olevia (the best of the off-brands - side-by-side, they were comparable to a high-end LG offering) 37" LCD TV for $800. A CRT would be more expensive.
The reason for this is simple: To increase a 20" CRT to a 40" CRT with double the vertical and horizontal resolution, the electron gun would have to scan four times as fast and be able to turn on and off four times as fast, with a four-fold increase in precision necessary. To be able to properly hit the screen, it would need to either be further away from the screen, or be at a much steeper angle - further increasing complexity.
On the other hand, you can pretty much make a 40" LCD out of four 20" LCDs joined at the edges.
As a side note, only plasmas are today known for a high degree of problems - and even then, five-year-old plasmas still look quite good today. LCDs are based off of a normal liquid-crystal panel (which, if left in one place, should last for at least ten years - laptop LCDs from 1996 still work today!), and the backlights are actually just a form of flourescent bulb - they've been around for a long, long, long time.
That said, you'll all be wanting the new flat-screen technology called FED. It's a technology from the 90's that produced amazing picture quality, but cost a fortune to make. However, carbon nanotubes can drop the price signifigantly.
http://www.technologyreview.com/NanoTech/17824/
It's really just a bunch of really tiny electron guns, each pointed at a seperate pixel. All the benifits of CRT without the pesky scanning and annoying electromagnets. (Goodbye de-gauss button!)
That said, I'm going to continue my hunt for a 21" flat-glass CRT monitor for my next PC. Mmmm....monitor-a-licious!